Brake-shoe construction



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INVENTOR SIDNEY G. DOW "QKrd/M ATTORNE-Y S. G. DOWN BRAKE sHoE connucnou Filed Deo. '1. 1923 Patented Nov. 17, 1925.

UNITED STATES PATENT OFFICE.

SIDNEY G. DOWN, OF PITTSBURGH, PENNSYLVANIA, ASSIGNOR TO THE WESTING- HOUSE AIR BRAKE COMPANY, F WILMERDING, PENNSYLVANIA, A CORPORATION OF PENNSYLVANIA.

BRAKE-SHOE CONSTRUCTION.

Application led December 7, 1923. Serial No. 679,232.

To alt 'wiwi/L- 'mttg/ concer/1t:

Be it known that I, Smnnr G. Down', a citizen ot' the United States, residinpl at Pittsburgh, in thefcounty ot Allegheny and State oi Pennsylvania, have invented new andV Auseful Improvements in Brake-Shoe Constructions, ot' which the following is a specification. 1

This invention relates to brake shoes and more particularly to a brake shoe construetion adapted for the internal expanding drum type of brake such as employed on motor vehicles.

The principal object ot my invention is to provide an improved brake shoe construe tion ot the above character.

In the accompanying drawing; Fig. l is a side elevational View ot abrake head, showing my improved brake shoe construction applied thereto; Fig. 2 an end elevation ot the construction shown in Fig. l; and Fig. 3 a 'fragmentary vie-w, showing in plan one of the end securing means for the brake shoe.

The brake head l, as shown in the drawing, is provided with an arcuate tace adapted to receive a metal brake shoe 2. According to my invention the brake shoe 2 is provided intermediate its ends with an inwardly extending radial lug 3. Said lug is adapted to engage a central raised portion 4 of the brake head l and said raised portion is apertured to receive a clamping bolt 5 which eX- tends through an opening in the lug 3.

At each end ot' the arcuate face, the brake shoe receiving face ot the brake head 1 is deflected inwardly from the plane of the arcuate tace and the opposite ends ot the brake shoe 2 are bent inwardly so as-to engage the inwardly deflected end portions. At one side ot' the brake head and at each ot the opposite ends an integral lug 6 is provided, having a transverse slot adapted to receive the corresponding end of the brake shoe 2. A rivet 8 extends across the slot 7 and the brake shoe 2 is provided With a notch 9 at each end for receiving the rivet 8 to permit the brake shoe to occupy its position on the brake head and at the same time provide a stop for maintaining the shoe in its proper position on the brake head.

The brake shoe 2 is applied to the brake head l by an axial movement with respectto the brake head and when in position, the notches 9 engage the rivets 8 and the lug 3 engages the face of the raised portion l (of the brake head l. A nut l() is then applied to the holt 5 and the shoe 2 is clamped to the brake head by screwing up the nut. so that only a single securing means is required.

The ends oi the brake shoe being disposed in the slots 7, the shoe is preventedtrom litting, and since the ends ot' the brake shoe are turned inwardly from the arcuate tace ot the brake head, the end portions ot the brake shoe will not be subjected to wear through frictional engagement of the brake shoe with the interposed friction face ot' the brake drum. Having now described my invention, what I claim as new and desire to secure by Letters Patent, is

1. The combination with a brake head having an arcuate face, of a brake shoe engaging said tace and provided with a single inwardly extending lue at one side ot the brake shoe and disposed centrally ot the ends ot the brake shoe and means for secnring said lug to the brake head.

2. The combination with a brake head having an arcuate face, ot' a brake shoe engaging said tace and provided with an inwardly extending centrally disposed lug, means for securing said lug tothe brake head, transversely slotted lugs on the. brake head tor receiving the opposite ends of the brake shoe, and pins associated with said lugs for engaging notches in said brake shoe.

In testimonv whereof I have hereunto set my hand.

SIDNEY .Gn DOWN. 

